GST Filing & Registration
End-to-end GST support from registration to monthly filing, to help you stay compliant.
Chennai's Premium Audit & Tech Partner
Smarter Compliance.Better Software.
Cosomtax Solution Private Limited offers end-to-end expertise in GST filing, income tax, statutory audit, and custom software development. Built for modern businesses across Chennai.
- Compliance-first
- Paperless Process
- Expert Support
- Clients Served
- 500+
- Years Experience
- 10+
- Services Offered
- 25+
- Clients Served
- 500+
- Years Experience
- 10+
- Services Offered
- 25+
- Cities Covered
- 12+
What we do
Comprehensive Services
From complex tax regulations to cutting-edge digital solutions, we provide everything your business needs to grow securely.
Income Tax Returns
Expert tax planning and ITR filing for individuals, professionals, and corporate entities.
Company Registration
Hassle-free incorporation for Private Limited, LLP, Partnership, and Proprietorship firms.
Statutory Audit
Statutory audit support carried out in line with professional auditing standards.
Tax Compliance
Strategic advisory and compliance management to help you avoid late fees and penalties.
Custom Software
Tailor-made web and mobile applications designed to digitize and scale your business operations.
Trusted by 500+ Businesses
Expert financial and technology services delivering results across Chennai and beyond.
Technology Division
We Build Next-Gen Software
Beyond audit and taxation, Cosomtax operates a dedicated technology division. We build custom software, intuitive mobile apps, and robust ERP systems to help traditional businesses embrace the digital age.
Web Applications
Scalable, secure, and blazing fast SaaS products and corporate portals.
Mobile Apps
Native-like experiences for iOS and Android to reach your customers anywhere.
ERP & Automation
Custom internal tools to digitize your operations and streamline workflows.
cosomtaxsolution.com/app
DeployedZero-downtime releases
Approach
Compliance-first
Dedicated experts for every business challenge
Your Growth, Our Mission
Why Choose Cosomtax?
We don't just process paperwork; we partner in your growth by combining financial acumen with technical excellence.
Expert Team
A blend of seasoned CAs, legal advisors, and senior software engineers.
Fast Processing
Streamlined workflows keep your filings and projects on track for their deadlines.
Compliance First
We navigate the complex regulatory landscape so you don't have to.
Dedicated Support
Your business gets a dedicated account manager for prompt query resolution.
How We Work
A simple, four-step process
A transparent, frictionless process designed to save you time.
- 01
Consult
We analyze your business needs and determine the best approach.
- 02
Document
Gather and verify all necessary data and requirements securely.
- 03
Process
Our experts execute the task, whether it's filing or coding.
- 04
Done
Receive final deliverables, compliance proofs, or deployed software.
Client stories
Trusted by Businesses
Don't just take our word for it. Here's what our clients have to say.
“Cosomtax handled our company registration and GST with incredible speed. Their software division also built our internal portal. Truly a one-stop solution for startups in Chennai.”
Rajesh KumarFounder, Technova Solutions“We've been relying on Cosomtax for our statutory audits for 3 years. Their attention to detail and proactive tax planning has saved us significant capital.”
Priya NatarajanDirector, Greenleaf Logistics“The custom inventory app they developed completely changed how we operate. It's rare to find a firm that understands both complex accounting rules and modern software architecture.”
Suresh MenonCEO, Buildcraft Retail
Official Government & ICAI Resources
E-Book Resource Centre
Curated official publications from CBIC, NACIN, Income Tax Department, and ICAI — real government e-books and standards available free to every business.
- GSTGST — Official NACIN, CBIC & ICAI Publications6 free resources
- Income TaxIncome Tax — Official Publications from incometaxindia.gov.in6 free resources
- UpdatesRegulatory & Budget Updates — Official Government Sources 2024-256 free resources
- Auditing StandardsStandards on Auditing (SA) — Official ICAI AASB Publications6 free resources
FAQ
Frequently asked questions
Quick answers about working with Cosomtax. For service-specific questions on GST, income tax, company registration, audit and software, visit our full FAQ.
Cosomtax Solution Private Limited offers GST registration and return filing, income tax return filing, company and LLP registration, statutory audit support, year-round tax compliance and advisory, and custom software development including web apps, mobile apps and ERP tools.
Our office is at Plot No. 12, Lakshmi Nagar 1st Street, Guduvanchery, Chennai, Tamil Nadu 603202. You can call us on +91 73394 40456 or email cosomtaxsolution@gmail.com.
Yes. Most of our work runs on a paperless process, so we serve clients across Tamil Nadu and other parts of India through secure document sharing, calls and video meetings.
Send us a message through the contact form, call or WhatsApp us, or email us. We start with a free initial consultation to understand your needs, then share the documents required and the next steps.
Let's Build & Grow Together
Whether you need tax compliance, an audit, or a custom software solution, our experts in Chennai are ready to help.